Help me :D 3)2t + 5t + 3,18 =25,3 2)7z - 3z = 5,12 Help me :D 1) 3а + 8а = 1,87

Question

Help me :D

3)2t + 5t + 3,18 =25,3 2)7z - 3z = 5,12 Help me :D 1) 3а + 8а = 1,87

Answer 1

2t+5t+3,18=25,3

7t=25,3-3,18

7t=22,12

t=22,12:7

t=3,16

 

 

7z-3z=5,12

4z=5,12

z=5,12:4

z=1,28

 

 

3a+8a=1,87

11a=1,87

a=1,87:11

a=0,17

Answer 2

1) 3а+8а=1.87

11а=1.87

а=1.87/11

а=0.17

 

2) 7z-3z=5.12

4z=5.12

z=5.12/4

z=1.28

 

3)2t+5t+3.18=25.3

7t=25.3-3.18

7t=22.12

t=22.12/7

t=3.16